Top 20 Penetration Testing Companies in United Kingdom 2025

Author: Prashant K | Date: May 21, 2025

Hey there! I’ve seen cyberattacks grow in sophistication, with the UK facing a 40% increase in cyber incidents in 2023. Penetration testing is critical to simulate real-world attacks and secure networks, applications, and cloud systems. This blog highlights the Top 20 Penetration Testing Companies in the United Kingdom for 2025, showcasing leaders who protect businesses from evolving threats .web:10.

The Importance of Penetration Testing in 2025

Penetration testing has been the most effective method for simulating and detecting actual cyberthreats that could impact networks, apps, and cloud environments for many years. The global penetration testing market is expected to grow at a compound annual growth rate (CAGR) of 16.6% between 2024 and 2030, reaching a value of $1.82 billion in 2023. Penetration testing is required in the UK to comply with GDPR, NCSC Cyber Essentials, and ISO 27001 standards. As a result, companies in the UK save an average of £2.9 million per breach.web:12.

When will Cyserch adequately support UK businesses with AI-powered penetration testing? Regular penetration testing with Cyserch will reduce your business risks and help gain trust from your customers .web:1.

Cybercrime Statistics That Demand Action

These UK-specific statistics highlight the need for penetration testing:

Cyber Incidents

40% increase in cyber incidents in the UK in 2023 (NCSC) .web:10.

Ransomware Costs

£2.1 million average ransomware cost in the UK (Sophos 2024) .web:12.

SME Attacks

32% of UK SMEs faced cyberattacks in 2023 (Cybersecurity Breaches Survey) .web:10.

Top 20 Penetration Testing Companies in United Kingdom 2025

1. Cyserch

Services Offered by Cyserch Security

Cloud Penetration Testing

Secures my cloud infrastructure against threats.

Learn More about Cloud Pentesting

Web Penetration Testing

Protects my websites from cyber attacks.

Learn More about Web Pentesting

API Penetration Testing

Ensures secure app integrations.

Learn More about API Testing

Mobile Penetration Testing

Safeguards my mobile applications.

Learn More about Mobile Testing

Network Penetration Testing

Fortifies my network defenses.

Learn More about Network Testing

AI-ML Penetration Testing

Secures my AI-driven technologies.

Learn More about AI-ML Testing

DevSecOps

Integrates security into my development pipeline.

Learn More about DevSecOps

Cyserch for Startups

Cost-effective plans for new businesses.

Learn More about Startups

VAPT

Comprehensive vulnerability assessments.

Learn More about VAPT

2. NCC Group - Global Cybersecurity Experts

Headquartered in Manchester, NCC Group offers CREST-accredited penetration testing to secure networks, applications, and cloud systems for UK businesses .web:11.

Available Services:

Penetration Testing
Vulnerability Assessments
Cloud Security Testing
Red Teaming
Compliance Audits

Visit NCC Group →

3. Context Information Security - Advanced Threat Simulation

London-based Context Information Security provides penetration testing and red teaming to protect UK organizations in finance and government .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Red Teaming
Web Application Testing
Incident Response

Visit Context Information Security →

4. Secureworks - Managed Security Testing

Secureworks, with UK operations in London, delivers penetration testing and managed security services to safeguard enterprises .web:12.

Available Services:

Penetration Testing
Vulnerability Assessments
Managed Security Services
Cloud Security Testing
Incident Response

Visit Secureworks →

5. Bulletproof - Cyber Essentials Specialists

Stevenage-based Bulletproof offers CREST-accredited penetration testing to meet NCSC Cyber Essentials and secure UK businesses .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Cyber Essentials Certification
Web Application Testing
Compliance Audits

Visit Bulletproof →

6. Hack The Box - Gamified Cybersecurity Testing

London-based Hack The Box provides tailored penetration testing for networks and applications, serving UK industries like finance and healthcare .web:4.

Available Services:

Penetration Testing
Vulnerability Assessments
Web Application Testing
Network Security Testing
Security Consulting

Visit Hack The Box →

7. Pen Test Partners - IoT and Application Testing

Buckingham-based Pen Test Partners specializes in penetration testing for IoT, applications, and cloud systems, securing UK businesses .web:11.

Available Services:

Penetration Testing
Vulnerability Assessments
IoT Security Testing
Web Application Testing
Cloud Security Testing

Visit Pen Test Partners →

8. Redscan - Proactive Threat Hunting

London-based Redscan combines penetration testing with threat hunting to protect UK organizations from advanced cyber threats .web:14.

Available Services:

Penetration Testing
Vulnerability Assessments
Threat Hunting
Network Security Testing
Incident Response

Visit Redscan →

9. Cyberis - CREST-Accredited Testing

Worcester-based Cyberis offers CREST-accredited penetration testing to secure networks, applications, and cloud systems for UK businesses .web:7.

Available Services:

Penetration Testing
Vulnerability Assessments
Web Application Testing
Cloud Security Testing
Compliance Audits

Visit Cyberis →

10. F-Secure - Enterprise Security Solutions

F-Secure, with UK offices in London, provides penetration testing and managed detection services for enterprises .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Managed Detection
Cloud Security Testing
Incident Response

Visit F-Secure →

11. Cyber Tec Security - Cyber Essentials Specialists

Gloucester-based Cyber Tec Security offers CREST-accredited penetration testing to secure UK businesses in finance and retail .web:12.

Available Services:

Penetration Testing
Vulnerability Assessments
Red Teaming
Cloud Security Testing
Compliance Audits

Visit Cyber Tec Security →

12. FourNet - AI-Enhanced Security Solutions

Manchester-based FourNet leverages AI for penetration testing, securing UK organizations’ networks and applications .web:14.

Available Services:

Penetration Testing
Vulnerability Assessments
AI-Driven Security Testing
Network Security Testing
Security Consulting

Visit FourNet →

13. Secarma - Agile Security Testing

Manchester-based Secarma provides agile penetration testing to secure applications and networks for UK businesses .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Web Application Testing
Network Security Testing
Security Consulting

Visit Secarma →

14. DigitalXRAID - CREST-Accredited Cybersecurity

Leeds-based DigitalXRAID offers CREST-accredited penetration testing to protect UK organizations in healthcare and finance .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Red Teaming
Cloud Security Testing
Compliance Audits

Visit DigitalXRAID →

15. Roke Manor Research - Defence Cybersecurity

Hampshire-based Roke Manor Research provides penetration testing for defence and government sectors in the UK .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Network Security Testing
Red Teaming
Security Consulting

Visit Roke Manor Research →

16. SureCloud - Cloud Security Testing

London-based SureCloud specializes in cloud-focused penetration testing to secure UK businesses’ digital infrastructure .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Cloud Security Testing
Compliance Audits
Security Consulting

Visit SureCloud →

17. Hedgehog Security - SME Cybersecurity

Birmingham-based Hedgehog Security offers penetration testing tailored for SMEs to secure networks and applications .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Web Application Testing
Network Security Testing
Cyber Essentials Support

Visit Hedgehog Security →

18. ProCheckUp - Comprehensive Security Assessments

London-based ProCheckUp provides penetration testing and security assessments for UK organizations in finance and technology .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Web Application Testing
Network Security Testing
Compliance Audits

Visit ProCheckUp →

19. Netcraft - Cyber Threat Intelligence

Bath-based Netcraft offers penetration testing and cyber threat intelligence to protect UK organizations .web:10.

Available Services:

Penetration Testing
Vulnerability Assessments
Cyber Threat Intelligence
Web Application Testing
Security Consulting

Visit Netcraft →

20. JUMPSEC - Governance and Compliance Testing

London-based JUMPSEC provides penetration testing and compliance services to secure UK businesses in technology and finance .web:20.

Available Services:

Penetration Testing
Vulnerability Assessments
Compliance Audits
Network Security Testing
Security Consulting

Visit JUMPSEC →

Why Cyserch Leads in Penetration Testing

Cyserch leads UK penetration testing with AI-driven solutions and a 97% client satisfaction rate in 2025. Our free consultations empower businesses to address cyber threats proactively .web:1.

Our expertise in network, application, and cloud testing tackles modern threats. Our UK-based team delivers tailored solutions for industries like finance and government. Choose Cyserch for cutting-edge protection. Contact us today for a free consultation .web:1.

How Cyserch Compares

Feature	Cyserch	Industry Average
Testing Speed	Fast turnaround	Standard pace
Support	24/7 assistance	Business hours
Cost	Competitive rates	Higher pricing
Expertise	AI-driven pentesting	Standard methods

What to Look for in a Penetration Testing Company

When choosing a UK penetration testing provider, consider:

Certifications

OSCP, CEH, CISSP, or CREST-accredited professionals

Testing Methods

Manual and automated testing with OWASP, NIST expertise

Reporting

Detailed, actionable reports with remediation steps

Industry Experience

Proven track record in your sector (e.g., finance, government)

2025 Trends Shaping Penetration Testing

Key trends driving penetration testing in the UK for 2025:

Penetration Testing as a Service (PTaaS): Cloud-based platforms offer continuous testing .web:10.
AI-Driven Testing: AI automates vulnerability detection and prioritizes risks .web:12.
Red Teaming Growth: Simulating advanced persistent threats (APTs) gains traction .web:11.
Cloud Security Focus: Testing cloud environments becomes critical as adoption grows .web:10.

Penetration Testing Companies Comparison Table

Company	Specialization	Certifications	Testing Types	Rating (2025)
Cyserch	AI-driven pentesting	CEH, OSCP, CISSP	Network, App, Cloud	★★★★★
NCC Group	Global cybersecurity	CREST, CEH	Network, App, Red Team	★★★★☆
Context Information Security	Threat simulation	CREST, OSCP	Network, App, Red Team	★★★★☆

* Ratings based on client feedback, service breadth, and market presence

Final Thoughts

In 2025, penetration testing is vital for UK businesses to combat sophisticated cyber threats. Cyserch leads with AI-driven solutions, but all 20 companies listed offer robust protection. Select a partner that aligns with your industry needs to secure your digital assets .web:1.

At Cyserch, we’re committed to excellence. Contact us for a free consultation to secure your business today .web:1.

Address your security risks with Cyserch. Book a Schedule your complimentary consultation today.

Frequently Asked Questions

Q: What is penetration testing?

Penetration testing simulates real-world cyberattacks to identify vulnerabilities in networks, applications, and cloud systems .web:10.

Q: Why choose Cyserch for penetration testing?

Cyserch offers AI-driven penetration testing, a 97% client satisfaction rate, and free consultations for UK businesses .web:1.

Q: How often should penetration testing be conducted?

Annual testing, or after major system changes, is recommended to address new threats .web:11.

Q: What’s the cost of penetration testing?

Costs vary, but Cyserch offers competitive rates starting at £2,000 for basic assessments .web:1.

Q: Is penetration testing required for compliance?

Yes, standards like GDPR, NCSC Cyber Essentials, and ISO 27001 mandate regular penetration testing .web:12.

Top 20 Penetration Testing Companies in United Kingdom 2025

Table of Contents

The Importance of Penetration Testing in 2025

Cybercrime Statistics That Demand Action

Cyber Incidents

Ransomware Costs

SME Attacks

Top 20 Penetration Testing Companies in United Kingdom 2025

1. Cyserch

Services Offered by Cyserch Security

Cloud Penetration Testing

Web Penetration Testing

API Penetration Testing

Mobile Penetration Testing

Network Penetration Testing

AI-ML Penetration Testing

DevSecOps

Cyserch for Startups

VAPT

2. NCC Group - Global Cybersecurity Experts

Available Services:

3. Context Information Security - Advanced Threat Simulation

Available Services:

4. Secureworks - Managed Security Testing

Available Services:

5. Bulletproof - Cyber Essentials Specialists

Available Services:

6. Hack The Box - Gamified Cybersecurity Testing

Available Services:

7. Pen Test Partners - IoT and Application Testing

Available Services:

8. Redscan - Proactive Threat Hunting

Available Services:

9. Cyberis - CREST-Accredited Testing

Available Services:

10. F-Secure - Enterprise Security Solutions

Available Services:

11. Cyber Tec Security - Cyber Essentials Specialists

Available Services:

12. FourNet - AI-Enhanced Security Solutions

Available Services:

13. Secarma - Agile Security Testing

Available Services:

14. DigitalXRAID - CREST-Accredited Cybersecurity

Available Services:

15. Roke Manor Research - Defence Cybersecurity

Available Services:

16. SureCloud - Cloud Security Testing

Available Services:

17. Hedgehog Security - SME Cybersecurity

Available Services:

18. ProCheckUp - Comprehensive Security Assessments

Available Services:

19. Netcraft - Cyber Threat Intelligence

Available Services:

20. JUMPSEC - Governance and Compliance Testing

Available Services:

Why Cyserch Leads in Penetration Testing

How Cyserch Compares

What to Look for in a Penetration Testing Company

Certifications

Testing Methods

Reporting

Industry Experience

2025 Trends Shaping Penetration Testing

Penetration Testing Companies Comparison Table

Final Thoughts

Address your security risks with Cyserch. Book a Schedule your complimentary consultation today.

Frequently Asked Questions

Q: What is penetration testing?

Q: Why choose Cyserch for penetration testing?

Q: How often should penetration testing be conducted?

Q: What’s the cost of penetration testing?

Q: Is penetration testing required for compliance?

Address your security risks with Cyserch. Book a Schedule your complimentary consultation today.